Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

{R/W}: Aisha of Sparks and Smoke gains first strike until end of turn.

Whenever Aisha deals combat damage, you may cast a sorcery spell from your hand with mana value less than or equal to that damage without paying its mana cost.

+1: Target permanent doesn't untap during its controller's next untap step.

-2: Ajani Vengeant deals 3 damage to any target and you gain 3 life.

-7: Destroy all lands target player controls.

{T}: Add one mana of any color in your commander's color identity.

{T}, Pay 1 life, Sacrifice Arid Mesa: Search your library for a Mountain or Plains card, put it onto the battlefield, then shuffle.

Destroy all lands.

Artifact and enchantment spells your opponents cast cost {2} more to cast.

Sacrifice Aura of Silence: Destroy target artifact or enchantment.

Creatures your opponents control enter the battlefield tapped.

Whenever a creature enters the battlefield under an opponent's control, you gain 1 life.

Each player separates all nontoken lands they control into two piles. For each player, one of their piles is chosen by one of their opponents of their choice. Destroy all lands in the chosen piles. Tap all lands in the other piles.

Whenever you cast a spell, add {R}. Until end of turn, you don't lose this mana as steps and phases end.

Creatures you control can boast twice during each of your turns rather than once.

Discard a card: Exile the top two cards of your library. You may play those cards this turn.

Destroy target land you control and target land you don't control.

---

Destroy all lands.

Each player chooses from among the permanents they control an artifact, a creature, an enchantment, and a land, then sacrifices the rest.

Destroy all lands or all creatures. Creatures destroyed this way can't be regenerated.

Prevent all damage target creature would deal this turn. That creature's controller may sacrifice a land. If the player does, they may copy this spell and may choose a new target for that copy.

{T}: Add one mana of any color in your commander's color identity.

{T}: Add one mana of any color in your commander's color identity.

Sacrifice Commander's Sphere: Draw a card.

You may play lands from your graveyard.

{T}: Add {R}.

As Cursed Mirror enters the battlefield, you may have it become a copy of any creature on the battlefield until end of turn, except it has haste.

Return target nonland permanent you don't control to its owner's hand.

Overload {6}{U} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

Exile all artifacts, creatures, and lands from the battlefield, all cards from all graveyards, and all cards from all hands.

Cycling {5}{R}{R} ({5}{R}{R}, Discard this card: Draw a card.)

When you cycle Decree of Annihilation, destroy all lands.

When Dockside Extortionist enters the battlefield, create X Treasure tokens, where X is the number of artifacts and enchantments your opponents control. (Treasure tokens are artifacts with "{T}, Sacrifice this artifact: Add one mana of any color.")

Target player sacrifices a land.

Threshold -- Each player sacrifices all lands they control instead if seven or more cards are in your graveyard.

Whenever an opponent casts their first noncreature spell each turn, draw a card unless that player pays {X}, where X is Esper Sentinel's power.

{T}: Add one mana of any color that a land an opponent controls could produce.

{T}: Add one mana of any color that a land an opponent controls could produce.

{T}, Pay 1 life, Sacrifice Flooded Strand: Search your library for a Plains or Island card, put it onto the battlefield, then shuffle.

Counter target instant or sorcery spell unless its controller pays {1}.

Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)

Each player chooses from the lands they control a land of each basic land type, then sacrifices the rest.

White spells you cast cost {1} less to cast.

Blue spells you cast cost {1} less to cast.

Spells your opponents cast cost {1} more to cast.

{T}: Add {W}.

{T}: Add {U}.

Lands don't untap during their controllers' untap steps.

At the beginning of each player's upkeep, that player untaps a land they control.

At the beginning of your upkeep, if there are seven or more lands on the battlefield, sacrifice Impending Disaster and destroy all lands.

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

({T}: Add {U}.)

{T}, Sacrifice Jeweled Lotus: Add three mana of any one color. Spend this mana only to cast your commander.

When Keldon Firebombers enters the battlefield, each player sacrifices all lands they control except for three.

Each opponent can't cast noncreature spells with mana value greater than the number of lands that player controls.

Whenever an opponent casts a spell, if no mana was spent to cast it, counter that spell.

{T}, Sacrifice Lotus Petal: Add one mana of any color.

At the beginning of your upkeep, flip a coin. If you lose the flip, Mana Crypt deals 3 damage to you.

{T}: Add {C}{C}.

Counter target spell. At the beginning of your next main phase, add an amount of {C} equal to that spell's mana value.

When you cast this spell, counter it unless you sacrifice a land.

At the beginning of each player's upkeep, that player sacrifices a land.

When there are no lands on the battlefield, sacrifice Mana Vortex.

You may have Mirrormade enter the battlefield as a copy of any artifact or enchantment on the battlefield.

Divine Intervention -- When Moon-Blessed Cleric enters the battlefield, you may search your library for an enchantment card, reveal it, then shuffle and put that card on top.

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

({T}: Add {R}.)

Myojin of Infinite Rage enters the battlefield with a divinity counter on it if you cast it from your hand.

Myojin of Infinite Rage has indestructible as long as it has a divinity counter on it.

Remove a divinity counter from Myojin of Infinite Rage: Destroy all lands.

Mystic Monastery enters the battlefield tapped.

{T}: Add {U}, {R}, or {W}.

First strike, hexproof

Whenever Narset, Enlightened Master attacks, exile the top four cards of your library. Until end of turn, you may cast noncreature spells from among those cards without paying their mana costs.

{T}: Add {R}.

{T}: Add {W}.

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {W}.)

({T}: Add {R} or {W}.)

Whenever a player taps a land for mana, if it's not that player's turn, destroy that land.

{T}, Pay 1 life, Sacrifice Prismatic Vista: Search your library for a basic land card, put it onto the battlefield, then shuffle.

Menace

Whenever one or more creatures you control deal combat damage to a player, create a Treasure token.

Sacrifice a Treasure: Exile the top card of your library. You may play that card this turn.

Whenever Ragavan, Nimble Pilferer deals combat damage to a player, create a Treasure token and exile the top card of that player's library. Until end of turn, you may cast that card.

Dash {1}{R} (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.)

{T}: Add {U}, {R}, or {W}.

Cycling {2} ({2}, Discard this card: Draw a card.)

({T}: Add {U}, {R}, or {W}.)

Raugrin Triome enters the battlefield tapped.

Cycling {3} ({3}, Discard this card: Draw a card.)

Destroy all lands.

Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.

Lands don't untap during their controllers' untap steps.

At the beginning of each player's upkeep, that player untaps a land they control.

{T}: Add {U}.

{T}: Add {R}.

{T}, Pay 1 life, Sacrifice Scalding Tarn: Search your library for an Island or Mountain card, put it onto the battlefield, then shuffle.

Sea of Clouds enters the battlefield tapped unless you have two or more opponents.

{T}: Add {W} or {U}.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

As long as you have 30 or more life, Serra Ascendant gets +5/+5 and has flying.

Flying

Once during each of your turns, you may play a land from your graveyard or cast a permanent spell with mana value 3 or less from your graveyard. If you do, it gains "When this permanent is put into a graveyard from the battlefield, exile it and you gain 2 life."

Your opponents can't cast spells this turn.

Whenever an opponent draws a card, that player may pay {2}. If the player doesn't, you create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

{T}: Add {C}{C}.

Spectator Seating enters the battlefield tapped unless you have two or more opponents.

{T}: Add {R} or {W}.

Players skip their untap steps.

At the beginning of your upkeep, sacrifice Stasis unless you pay {U}.

When Stoneforge Mystic enters the battlefield, you may search your library for an Equipment card, reveal it, put it into your hand, then shuffle.

{1}{W}, {T}: You may put an Equipment card from your hand onto the battlefield.

Return all lands to their owners' hands.

Equipped creature gets +1/+1.

Whenever equipped creature attacks, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Equip {2}

Whenever a land enters the battlefield, tap all lands its controller controls.

Take an extra turn after this one. Exile Temporal Mastery.

Miracle {1}{U} (You may cast this card for its miracle cost when you draw it if it's the first card you drew this turn.)

Each player sacrifices a land for each card in your hand.

Whenever you cast an instant or sorcery spell, copy it for each other instant and sorcery spell you've cast before it this turn. You may choose new targets for the copies.

Training Center enters the battlefield tapped unless you have two or more opponents.

{T}: Add {U} or {R}.

As long as Trinisphere is untapped, each spell that would cost less than three mana to cast costs three mana to cast. (Additional mana in the cost may be paid with any color of mana or colorless mana. For example, a spell that would cost {1}{B} to cast costs {2}{B} to cast instead.)

({T}: Add {W} or {U}.)

Flash

Vigilance

Aegis of the Emperor -- Commanders you control have protection from everything.

({T}: Add {U} or {R}.)

Destroy target land and all other lands with the same name as that land.

As long as Winter Orb is untapped, players can't untap more than one land during their untap steps.

Whenever equipped creature deals combat damage to a player, destroy all permanents other than Worldslayer.

Equip {5} ({5}: Attach to target creature you control. Equip only as a sorcery.)